Process eoe platiutg metal on uojstmetallic surfaces



Patented Feb. 6, 1923.

UNITED STATES ERNEST F. DIETflICH, OF CHICAGO, ILLIHO' rnocia'ss r011 PLATING METAL on nomam'umc SURFACES.

Ho Drawing.

To all 'w/mm. '12 may can e-1"" Be it known that 1,;Enxswr l". Dir-omen, a citizen of France. and a rosideut of' (hica. 0, in the 'county of ('obWumIHtnte of ll lflUlS', have invented a nH-W und us fu Improvement in lrm-essrs for Plating Metal on Non-metallic Surfm-es, of which the following-is a full, clean), and (-x uel dvscri )tion.

llly inveutioh relates to imprm'oments in the process for plating metal on non-metallic surfaces, .sueh as china, porcelain, glass, or the like, and it mnsists in the Stops hereinafter diaseribed and the combinations, eonstruetions, and arrangements hen-in described and elaimed.

An olijerrt' of my invention is in provide a process of the character desrrilmd in whirl, metals, such as silver, gold, ornickel, may be permanently depositedon non-umtullnsurfaees by an electrolilting bath.

A .further. object o my invention is to provide a process of the character llt'h'l'l'lllt'll in which n water impervious glue is i-m played for supporting a' current conducting substance. permitting the deposit of metals thereupoh by eleetro-plnting process.

, further'objert of my invention is to provide a iroeess of the rhuructiudi-sm-iln-d in which the metal deposits will not homunloosened by heator moisture.

Other objects and advantages will uppeu r in the following specification. and the novel features of the invention will he partit'ularly pointed out ii the appended claims.

' in earryingout myinventiou. I make use of a non-metallic article, such as glass dish or china dish upon which it is desired to deposits plating of ametal.

first p ace 9. quantity of n grmd-grudo of either ge'lati'ne o glue in a receptacle (:(mt'aining water and let the gelutine or glue soak thus for at least twenty four hours.

I then place the gelatineor glue over a. moderate fire and add thereto -1 part of hydrochloric acid to 10' parts of gelatine. The mixture is then stirred untilit is homog enousand in nearly fluid state; The proportion of ingredients given are by volume as well as the'pro ortion of ingredients in the remainder of tiiis specification.

I next add 1 part of'zinc sulphate and 1 part of acetic oeid to keep the mixture in a liquid state. I then add i part at potassium bichromate and 1} parts chromic acid which when thoroughly mixed with the foregoing Application filed 15 20,1922.

ScrlflNo. 502,471.

mixtmg; renders the glue insoluble in water and prevents the glue from ,lOOSGIllfl when brou ht into contact with acids or a. kalies;

and forms a eomontitious liquid.

I then mix 1 part of the foregoing eenioutitious mixture with 2 or 3 parts of a good grade of graphite. v I The mixture or paint so formed may nowhe painted on the disk by a hand-brullh or more referably an air brush. The dish when painted is then planed in the sun to dry or upon a lire until the paint is thoroughly dried.- V

When the [mint on the dish has settled after the drying, it is then plated with eopper in the l'ollowing munner:

'lhu eleirtrolyte used is cyanide of soda mixed with copper eal'bonate, sodium carbmmto and water. 'llw. anode is pure coppm and llu: cathode the painted portion of the dish. When our-rent is passed through tluplating bath in the manner known to tlmso skilled in the art a film of copper is deposited upon the painted portion of the disll.

'l'his copper plating upon the painted portion may then be used as a body upon Wlllfll other nwtals, such as silver, gold, or the like, may he plated in the manner known to those skilled in the plating alt. Instead of using graphite as the material. for mixing with the gelatinous substance in order to oomllutt the current, l may use any suitable form of metal powder, such as bronze powder. I lind that this works equally as well as graphite.

)llt'. ol' the advantages of articles, such as china, dishes, glassware .and poreelains lowing a metal plate thereupon is that the urtiole is rendered stronger by the presence of the metal and yet possess all of the advantages of the materials or which the base of the articles are made.

Another advantage of my process is that the articles may be treated In the manner described at relatively -a. relatively short time.

I' claim:

1. The herein described process for lat ing metal on non-metallic substance W ich consists in painting the substance with a 'mixture eontainin glutinous substance and an electrically eon ucting material and sub: sequently plating the gubgtance with q meta in an electmplatink little expense and in minted portion of the- 2. The herein described process for plutin g metal on a I)[llIIBti1lllC substar we, which consists in painting the substance with (L mixture. containing a gelatinous substance. and an nlcrtrically conducting material and subsequrntly plating the painteil portion of tliv substance with a metal in an electroplating bath.

234 The herein ilesrribeil process fur plat ihgmetal on u nnnanetnllicsubstance, which onsists in painting the substanre to be platml with a mixture cunt-(lining gelatin? potassium bichrnmutv. t'lll'flllllt uniil. zinil graphitv :iml suhsrqnently plating the paintrrl pnrtinn 0f the substance with a metal in an electrnplating bath.

4. The herein (lPSt'I'llJHl process fur plat ing mvtzil on u nnn-mrtullir substanre. whii-h consists in painting the substani-e to be pliiteil with a mixturi' rsuntdiniiu glue potas shun bichrnmute, rhrnmic arid unil graphitianil subsequently plating tln painted pnrtinn of thu substance with a metal in an elui-ti'n-plating bath.

5. The herein described proress for plat ing metal (in a nnn mctnllic snbstunw. which consists in muting tlu' substance with a mixture continuing ill pin-ts nl' gi'lutinv, fl part of potassium "bichrnmatv, 21ml 1 part of chi'uinic ariil, \\-'hcrvb y the gulutiim is renilei'eil insoluble in water and subsequently plating thincmtml pnrtinu of suiil substanru with a mvtal in an oloctrn-plating bath.

(3. The. bvii-in ilvsi'iibvil prni'i'ss fur niuk ing a current conducting paint whirl ('nn sists in mixin; gvlatiniwith Wiltll'. in 2I l(l' in; lI V(lI(I('lIlUll( mill. in stirring: tln' mix turn to u hnnmgcnnus smni-liqnid state and suhsequuntly aililing potassium bichrmnutv and chrnmiu aciil.

7. The herein ilosizribi'il process for |Illll ing: current -mnlin-tin; paint whirl) rnnsists in mixing gvlutine with water, in aililing llylll(i 'lll(lll(' 2l(l(l. in stirring the mixtnrr tn :1 lmnmgrunnus semrliquid stutv, and subsequently uililingi {1 part potassium bichrnmute and ll parts of chromic acid.

EH NEST F. DI E'IRICH. 

